Improvement in mill-gearings



'anni didn;

Aand slides back and forth.

i naar sate HENRY SHOEMAKER AND JOHN-ALEXANDER MCeLINroe-K. or PERRY, ILLINOIS..

l Letters Patent No. 109,063, dated November 8, 1870.

lm PRovE'MENTiN MILL-centaines.

The Schedule referred to in these Letters Patent and making part f the same.

T0 @U 107mm if ma!! 0012067?! t lplay allows the pinion to be thrown into or out of Be itv known that We, HENRY 'SHOEMAKEIQ and J oHN ALEXANDER McGLINTooK, of Perry, in the county of Pike and 'State vof Illinois, have invented a new and useful Improvement in Mill-Gearing; and

we do hereby declare that the following is a full, clear, and exact description thereof, which will enable'others skilled in the art to make and use the same, reference being had to the accompanying retarding the motion oi' the propelling power; andA It consists- First, in amechanism for throwing the spindlepinion out of and into gear with the spur driving- `wheel and xing it in position.

Secondly, in the use of a coil-spring in the pinion, by means of which vthe inertia of the bur is overcome, so that the gearing revolves smoothly and without jerk or concussion; and

lf llhirdly, in the mode of revolving the pinion without driving the bur or spindle with the several mechanisms connected therewith, as will be hereinafter more fully described.

In the accompanying drawing.`

Figure l represents a side elevation of the* ap-A paratns, partly in section.

Figure 2 is a horizontal section of iig. l, on the lines x z, looking down.

Similar letters of referenceindicate corresponding parts.

A is the pinion-spindle which is connected with the bur-stone by the `ordinary driver, and isstepped into the bridge-tree B, in the usual manner.

C is the pinionwhich is supported by the lever D.

'This lever has -only a horizontal movement with its fulc'rnm on the stand E. l

F is a stand-plate upon which the lever rests Bya movement of 'the lever on this plate, the pinion is thrown into or ont of gear with the spur-wheel.

G is a stop on the plate F, which limits the move# ment of the lever, but allows the pinion to be thrown into gear with the'spur-wheel.

The lever is held and .fastened in any desired position on the plateby means of the hook H and cccentric lever I, arranged and loperating as seen in the drawing.

J is va hollow journal on the upper side of the lever towhich the hub K of the pinion is fitted, so that .fthe pinion will freely revolve thereon.

The hollow journalff is bored of greater diamey ter than the spindle which passes through it. This gear with the spur-wheel.

The journal J of the lever 'also allows the pinion to revolve freely, without revolving the spindle.

L is the lower portion of a coupling, which is allowed to revolve on the spindle, Abut held down in place by a collar on the spindle.

M is a coil-spring placed' in a recess in the up- ,per side of the pinion, one end of which is attached -to the rim of the pinion, and the other end is connected with the coupling L by means of a hook, N, `ou the coupling, and a slt hole in the end ofthe spring. This arrangement allows the coupling to slip or revolve backward under the recoil of the spring at the time of unconpling.

In coupling, the hook slips automatically into the slot, and `coils the spring sufficientlyto overcome the inertia of the4 bur at the time of starting.

` The spring forms a connection between the pinion and the coupling, and also prevents back-lashing in the gearing at all times.

O is the other .portion of the coupling which slides y,.on a feather on the spindle, and is operated by the forked lever P.

` llhis lever has its i'nlcrum at q,- and is held in position for coupling or unconpling by a spring-hook, seen` at R.

By the use of the above-described device, the miller has complete control of the hurs at any and all times, as they may be started or stopped instantly without in any manner interfering with the rest of the machinery of the mill, and without danger of damage from the sudden vjerk and collision ot`- gearing.

Having thus described our invention,

We claim as new and desire to secure by Letters Patent- 1. The lever D with the hollow jonrnal'J,`aud the mode of supporting, guiding, and fastening it, snb. stantially as and for the purposes herein shown and described.

2. The spring M in combination with the pinion O and coupling L, and the mode of connecting the spring with the coupling, substantially as and for the purposes described.

Y 3. The pinion and'spindle arranged so as to revolve independently of each other, substantially as described.

4. The'forked lever P, and the mode of supporting it, and the spring catch R for holding it 4in place, substantially as described,

HENRY SHOEMAKER. `Witnesses: J OHNv ALEX. MCOLINTOOK.

JNO. E. MoRToN, T. SHOEMAKEB. 

